"...how many people will he feed (he=the fish)he thought. But are they worthy to eat him? No, of course not. There is no one worthy of eating him from the manner of his behavior and his great dignity." I think this is Hemingway asking how many people will understand or interpret his idea/story the right way, but at the same time saying that nobody is actually worthy of reading his work because it's far too good for anyone, showing a vast amount of arrogance/cockiness.

What I thought was about what Mr. Hart said about Hemingway being so smart. Mr. Hart talked about how since Hemingway was so smart that he couldn't relate to others and felt that he was too smart for them. So I think this particular quote proved that point. Hemingway felt that his work was to righteous for others to read or comprehend and that they didn't deserve his work, even though he was so desperate about finishing it.